Rip string envelope



April l10`, 1934. I w. E. Swirl-"r,v 1,954,271

' l RIP -STRING ENVELOPE v- F11ed nov. 14, 1951 J//d/JLSM' www@ ' 25 une 343 or Fig. 1,

" 30 arrows.

45 thereby loosely Patented Apr. 10, 1934 1,954,271l a RIP s'rmNG ENvELoPE Willard E. swift, worcester, Mass., United States Envelope Company,

Mass., a corporatitfn of Maine Application November 14, 1931, Serial No. 575,017 Claims. (Cl. 229-86) The present invention relates to that type of envelope which is provided with a rip string, so that one side of the envelope may be quickly and completely openedby apull on the string to per- 5 mit ready discharge of the contents of the. en-

velope. A Envelopes embodying the present invention are particularly adapted -for the packaging of. pulverulent materials, such as vindividual servings of food, or beverages in powdered form, each envelope being so folded as to effectivelyprevent leakage of pulverulent material therefrom, with its rip string adapted to cleanly sever one edge, sothat the contents maybe discharged with a 15. minimum of spilling. The above and other advantageous features of the invention will hereinafter more fully appear from the following description withl reference to the accompanying drawing, in which:-

Fig. 1 is a rear view the invention.

Fig. 2 is a plan velope.

Fig. 3 is a longitudinal sectional view along the showing the envelope filled with pulverulent material, and with the seal nap closed.

Fig. 4 is a transverse sectional view along the line 4-4of Fig. 3, looking in the direction of the view of the blank for the en- Like reference. characters refer to like parts in the different gures.

Referring first to Fig. 2, which represents the blank from which the envelope is made, 1 desig nates the body portion, or front wall of the envelope, 2 designates the back flap. 3 the seal flap and 4, 4 the side flaps, the broken lines bounding the body portion 1 indicating the creases on which the several flaps are to be folded.

In forming an envelope from the blank represented in'Fig. 2, a length of string 5 is positioned along the intersection between the body 1 and back flap 2, after which the back flap 2 is folded on the broken line 6 into contact with the body 1, holding the string 5 between the body and flap with its ends projecting from 4opposite sides of the blank. Gum having ben applied to the side flaps 4, as indicated at '1, the side naps are then folded over on the broken lines 8, 8 to bring their gummed portions into contact with the outer face of the folded over back flap 2,.

Atthis point it is to be noted that the width of the back ilap 2 is somewhat greater than the distance-between the unes or folding s, a or the side i naps 4, so that marginal portions of the back flap of an envelope embodyingassigner to Springfield,

2 overlapping the lines 8, 'B are folded over with the side flaps 4, as indicated by the broken lines 8a, 8a. This second folding of the marginal portions of the previously folded ,back flap 2 results in turning back short lengths of the rip string 5 00 at the lower corners of the completed envelope,` as shown clearly in Fig. l, thereby holding the. string i'n position, although its intermediate portion along the folding line 6 is not secured tothe blank. This double folding of the back ap 2 05 also effectively seals the lower corners of the envelope.

The final step in he formation of the envelope resides in folding over, or scoring, the previously gummed seal flap 3 along the broken line 9, which substantially coincides with the top edge of the folded over back flap 2, the completed `envelope then appearing as shown in Fig. 1, with the seal flap 3 turned back. It is to be noted that the junctions ofthe are located above when the envelope seal flap 3 the upper side flaps 4 with the seal flap 3 7 the line of folding 9, so that is closed by turning down the corners of the 4envelope are effectively sealed'by the double folding of the ao side flaps 4.

Referring `new to velope is shown as Figs. 3 and 4, the sealed enhaving been filled with a pulverulentl material 10; andit is evident that it is practically impossible from the four corners tudinal'edges, due

for the material to escape thereof, or along its longito the double, or safety, folding of the back flap 2 and side flaps 4 in the manner previoulsy described. Furthermore, while the rip string 5 extends loosely within the bottom edge of the envelope, 10 lcannot escape emerges from the the pulverulent material 9 along the string where it sides of the envelope, due to the folding back of the string upon litself at the places of the rip string where the margins of the back flap 2 are folded with the side 5 flaps 4. This reverse folding 5 effectively prevents accidental withdrawal of the string from .the en' velope, and also presents the projecting string ends so that they may bereadily seized for pulling.

when it is desired to open the envelope. The

initial pull on either end of the string 5 first causes tearing between the overlapped flaps toward one corner of the envelope, tears the bottom edge of 1y open the same. string 5 is only after which the string 5'. the envelope to complete- Since the tearing of the rip through one thickness of paper,

the opening operation can be performed very quickly with one envelope body with hand while holding the lled the other hand in such a position as to discharge its contents with a minimum of spilling.

I claim,

- 1. A container or envelope of the class described, comprising front and back walls, side flaps and a flexible rip strand extending along the junction between said front and back walls,

'said back wall being folded over into engagement with the front wall to loosely enclose said rip strand, and said side flaps, together with marginal portions of said previously folded back wall, being folded over to turn back and secure portions of said rip strand' at opposite sides of said container.

2. A container or envelope of the class described, comprising front and back walls, side flaps and a flexible rip strand extending along the junction between said front and back walls, said back Wall being folded over into engagement with the front wall to loosely enclose said rip strand, and said side flaps, together with marginal portions of said previously folded back wall, be-

ing folded over to turn back and secure portions of said rip strand at the lower corners of said contalner with free ends of said strand extending beyond said corners, whereby a pull on either end of said strand will sever the front and back' walls along the line of fold therebetween.

3. A container or envelope of the class described, comprising front and back walls folded over to loosely enclose a flexible rip strand and side flaps folded over with marginal portions of said back wall to reversely position and retain portions of said rip strand at the lower corners of said container.

4. A container or envelope of the class described, comprising front and back walls folded over to loosely enclose a flexible rip strand and side flaps folded over with marginal portions of said back wall to reversely'position and retain portions of said rip strand at the lower corners of said container, the vdouble folding of said flaps and said back wall serving to seal the corners of said container and its longitudinal edges against the escape of pulverulent material within the container.

5. A container of the class described, comprising front and back walls folded over toloosely enclose a flexible rip strand and side aps lfolded over with marginal portions of said back wall to reversely position and retain portions of said rip strand at the lower corners of said container, the double folding of said flaps with the back wall serving to seal the corners of said container to prevent escape of pulverulent material from said container atl said corners and along said rip strand.

WILLARDE. SWIFT. 

